Three allopatric species of cat native to Israel are also highly sexually dimorphic, resulting in six unique morphotypes. Each of these has teeth whose size distributions overlap very little where species co-occur, but are much more variable where no other species occur. The most plausible hypothesis to explain this pattern is: a. community wide character displacement has acted to reduce competition for limiting prey.
b. the cats are incorrectly identified and must belong to the weasel family, Mustelidae.
c. teeth are phylogenetically conservative and subject to environmental filtering.
d. teeth are used as a signaling device within species to identify potential mates.
e. the cats are involved in an evolutionary arms race towards larger teeth.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.